Onboard diagnostics (OBD) systems have been around since the 1980s and were developed to help limit harmful automotive exhaust emissions. Between 1988 and 1995, U.S.-built vehicles came with what's ...

A 2000 Chevy Blazer with a 4.3 engine and about 165,000 miles on it came into the shop, and the owner was complaining of a check engine light, poor fuel mileage, and a code P0300. P0300 is a random ...

When the check engine light comes on in a vehicle, it’s indicating that there is some issue with the car that should be checked out. It could be something minor, such as the gas cap not being screwed ...